Revert "Increase chunk_size to improve download speed from google storage"
Revert "Increase chunk_size to improve download speed from google storage"

This reverts commit fd604829452f45e473993993d00c94375396a95f.

StanfordBioinformatics/loom,StanfordBioinformatics/loom,StanfordBioinformatics/xppf,StanfordBioinformatics/xppf,StanfordBioinformatics/loom,StanfordBioinformatics/loom,StanfordBioinformatics/xppf,StanfordBioinformatics/xppf